Merge pull request #10732 from Riyuzakii:10598

* Introduces error throw for line drawn with THICKNESS=0

modules/core/misc/java/test/CoreTest.java

@@ -876,7 +876,7 @@ public class CoreTest extends OpenCVTestCase {
         Point point1 = new Point(0, 0);
         Point point2 = new Point(nPoints, nPoints);
 
-        Imgproc.line(gray0, point1, point2, colorWhite, 0);
+        Imgproc.line(gray0, point1, point2, colorWhite, 1);
 
         assertTrue(nPoints == Core.countNonZero(gray0));
     }

modules/imgproc/src/drawing.cpp

@@ -1814,7 +1814,7 @@ void line( InputOutputArray _img, Point pt1, Point pt2, const Scalar& color,
     if( line_type == CV_AA && img.depth() != CV_8U )
         line_type = 8;
 
-    CV_Assert( 0 <= thickness && thickness <= MAX_THICKNESS );
+    CV_Assert( 0 < thickness && thickness <= MAX_THICKNESS );
     CV_Assert( 0 <= shift && shift <= XY_SHIFT );
 
     double buf[4];

modules/imgproc/test/test_drawing.cpp

@@ -750,5 +750,11 @@ TEST(Drawing, putText_no_garbage)
 }
 
 
+TEST(Drawing, line)
+{
+    Mat mat = Mat::zeros(Size(100,100), CV_8UC1);
+
+    ASSERT_THROW(line(mat, Point(1,1),Point(99,99),Scalar(255),0), cv::Exception);
+}
 
 } // namespace